I've just downloaded and installed Ubuntu 10.10 in a VM on virtualbox (4.0.4). Everything on the VM is set to the defaults: NAT adapter. When installing the OS, I selected OpenSSH, and nothing else.
I've tried to connect to the server via ssh from the host (running Mac OS X), but it only timeouts. Can't scp my credentials to it or ping the server either. As far as I can tell, the server is connected fine, has a valid IP, and can ping google.com.
I know I'm missing something basic here... I don't believe I have any kind of firewall up, unless there's one I don't know about that comes with the install. iptables has the default configuration.